For recompiling use "qmake && make" the sorce depends to QT-3.3.x, QSA-1.1.x and Glew. Don't use QT4.x with QSA-1.2.x that doesn' work.
Start the program via shell "./gl" to see the GLSLcompiler warnings and errors.

Known Bugs:
All objects should have different names, because they are used by scripts. That's not checked jet. Rename objects using F2.
Testobjectscript: Only sphere is working.
OBJ importer: LWO name is wrong. Many OBJ files use multiple Indexstreams but that's incompatible to VBOs.
Don't close the cam.

A Simple Test:

Make a leftklick on the Wold and add a "node".
Add via Nodes contexmenu: Vertexshader, Fragmentshader, Script and a Texture
Texture : Load media/2kEarth_comp.jpg via contextmenu
Klick on the Node to select it, than run plugins/test_object.js from "Scripts" menu and say create.